Collaborative Research: High Fidelity Gates and Qubit Addressing for an Optical Lattice Quantum Processor

这一研究项目带来了原子捕获、冷碰撞和量子控制方面的一些最新进展，以应对中性原子量子计算的两大挑战。主要目标是：(1)在最新预测的陷阱诱导共振的存在下，基于分子控制，为光学晶格中的原子展示一种通用的两量子位量子门。该小组将在对光学晶格中的铯原子进行的系综实验中使用两粒子干涉计量学来详细评估门的性能，同时紧密协调的理论工作将开发新的和优化的量子逻辑协议；(2)设计协议，用于对光学晶格和其他在衍射极限中无法分辨的陷阱几何图形中的原子量子比特进行稳健和单独的寻址。基本的方法是层析成像，利用光钳中的光移来使目标量子比特与脉冲微波场发生共振。控制理论将被应用于设计与相邻量子比特之间的串扰最小的健壮门。这项工作涉及来自亚利桑那大学和新墨西哥州大学的一组研究人员。这项研究将对量子信息科学(QIS)的知识库做出重要贡献。学生将参与该项目的所有方面，包括培训、研究和成果的传播。该项目将保持并进一步加强参与研究小组之间的伙伴关系，并提供一个消除理论和实验之间人为分割的教育环境。教育和宣传的一个重要工具是西南量子信息和技术(斜视)网络。Squint主办了一次年度会议和一年两次的暑期学校和务虚会，主要针对研究生和博士后。专业人士会从本身的研究小组以外物色杰出的学生，特别是女性、少数族裔和本科生，并赞助他们出席斜视会议。目前，在斜视内部还没有开展这类外联的机制。

This research project brings some of the latest advances in atom trapping, cold collisions and quantum control to bear on two major challenges of neutral atom quantum computing. The main goals are: (1) To demonstrate a universal two-qubit quantum gate for atoms in optical lattices based on molecular control in the presence of a newly predicted trap-induced resonance. The group will use two-particle interferometry in ensemble experiments with cesium atoms in optical lattices to evaluate the gate performance in detail, while a tightly coordinated theory effort will develop new and optimized quantum logic protocols; (2) To design protocols for robust and individual addressing of atomic qubits in optical lattices and other trap geometries that are not resolvable in the diffraction limit. The basic approach is tomographic, using the light shift in optical tweezers to shift the target qubit into resonance with a pulsed microwave field. Control theory will be applied to the design of robust gates with minimal cross talk to neighboring qubits. This work involves a team of researchers from the Universities of Arizona and New Mexico. The research will contribute significantly to the knowledge base of Quantum Information Science (QIS). Students will be involved in all aspects of the project, including training, research, and the dissemination of results. The project will maintain and further strengthen the partnership between the participating research groups, and provide an educational environment where the artificial division between theory and experiment is removed. An important tool for education and outreach is the Southwest Quantum Information and Technology (SQuInT) Network. SQuInT hosts an annual meeting and a biannual summer school and retreat focused primarily on graduate students and postdocs. The PIs will seek out exceptional students from outside their own research groups, in particular women, minorities and undergraduates, and sponsor their attendance at SQuInT meetings. There is currently no mechanism within SQuInT for carrying out this type of outreach.